Beam latch or dog for looms, &amp; c.



PATBNTED JAR-13,- 1903.-

'AAPPLIOATIQN' FILED 00T. 2a, 1902.

H0 MODEL.

sus cn., waruumu., wnsuwarou, o. c.'

UNITED 'STATES PATENT OFFICE.

JOHN T. MEATS, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO MASON MACHINE WORKS, OF TAUNTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

BEAM LATCH OR DOG FOR LOOIVIS, 80C.

SPECIFICATION forming part of Letters Patent No. 718,268, dated January 13, 1903. Application filed October 23,1902. Serial No. 128,431. (No model.)

To all whom it 'Wray concern:

Be it known that I, JOHN T. MEATS, a citizen of the United States, and a resident of Taunton, county of Bristol, State of Massachusetts, have invented an Improvement in Beam Latches or Dogs for Looms, &c., of which the following description, in connection with the accompanying drawings, is a specication, like letters on the drawings representing like parts.

This invention has for its object the production of a novel and effective longitudinally-extensible latch, dog, or hook for use in connection with warp-beams of looms, Vto hold the journals thereof in their bearings, and with slight modification applicable for other purposes.

In accordance with myinvention the latch or dog comprises, essentially, two chambered members relatively movable longitudinally, superposed one upon the other to-inclose a spring whichresists their extension, and with slidable locking means to preven t lateral separation of the said members. The spring is in closed completelyr and concealed by the said members, which latter are substantially semicylindrical in their chambered portions and slide upon each other, one member being provided with a fulcrum-hub in the presentinstance of my invention and the other member with a latch-hook or similar device.

The Various novel features of construction embodied in my invention will be described hereinafter and particularly pointed out in the following claims.

Figure lis a side elevation of a latch or dog embodying my invention and illustrated in connection with a portion of a loom to serve as a beam-latch. Fig. 2 is a part-longitudinal section ofthe latch or dog shown in Fig. 1. Fig. 2a is a similar View of a portion of one of the members of the latch or dog. Fig. 3 is a transverse sectional view on the line 3 3, Fig. 1, looking toward the left. Fig. 4 is a similar view on the line 4 4, Fig. 1. Fig. 5

is a side elevation, and Fig. 6 is a top or plan view, of a modified form of the device to be described.

Referring to Figs. 1 and 2, the latch or dog comprises two superposed members A and B, the former having a semicylindrical or chambered portion a, Fig. 2, closed at one end to form an abutment ct' and having an overhanging shoulder d2 at the other end of the chambered portion, the top of the abutment being beveled, as at a2, Fig. 2'. Beyond the shouldered end of the portion a the member A is flattened and shaped to form a latch-hook a5, downturned, as herein shown, and terminat ing in a suitable handle a4. At its closed end a the member A is provided on its opposite sides with two upturned lugs a5, Figs. 2', 3, and 4, having inturned heads a6, which overhang the rearwardly beveled 0r inclined portions ca? at the rear ends of the longitudinal edges of the portion a, spaces being left between the inner upright sides of the lugs and the abutment ct', the under faces of the heads a being convexed, as shown clearly in Fig. 2', at as. The member B is semicylind'rical or chambered at b, it having substan tially the same radius as the part a of the member A, I

upon which latter it is superposed, and at one end the member B has a downturned abutment b with a projecting tongue b2 on its outer face. At its opposite end the said member is enlarged to form a fulcrum-hub bs, and short longitudinal ribs b4 are formed on its sides to pass beneath the heads a6 and between thelugs a5 and the endY a of member A. A strong spiral expanding spring S is inserted in the tubular chamber formed by the superposed parts wand b of the two mem bers, the spring bearing at its opposite ends against the end a of the one member and the abutment b' of the other member, respectively. Between the ribs b4 and the hub b3 the under face of the member B is beveled, as at Z920, Figs. l and 2, on the lower edges of its depending sides for a purpose to be described.

In assembling the members the part of the member B between the hub and the ribs b4 is dropped down between the lugs 0.5 and the beveled edges Z920 are tilted to rest on the inclined edges c7 of the memberA and the spring S is inserted between the parts aand b. 4The memberB is then drawn rearwardlyor toward the right, Fig. 1, its ribs b4 passing beneath the overhanging heads a5, the conveXed faces 0.8 of the latter permitting such movement, and when the tongue b2 can descend past the end of the shoulder a2 the member B is turned down till the longitudinal edges of its portion Z2 rest upon the Corresponding edges of the portion a, of member A. The spring S, which has been compressed by the previous operation, is permitted to expand, and it immediately causes the members to assume the relative position shown in Figs. 1 and 2.

I prefer to bevel the top of the end a of the part o, in order that the relative tipping movement of the two members in assembling may be facilitated. At such time the cooperation of the tongue and shoulder and the heads of the lugs ai with the ribs b4 constitutes sliding locking means to prevent accidental lateral separation of the members, while they ma51 be extended by relative longitudinal movement, which is resisted bythe spring. The latter is whollyinclosed and protected by the chambered portions, and the end of the shoulder cooperating with the face of the abutment b' above the tongue b2 acts as a stop to limit thespring-induced movementof the members.

In Fig. l the hub b3 is shown as mounted on a fulcrum-stud @22 on the loom side AX, the latter having a notched bearing @25 for the journal w of the warp-beam W. The latchhook a3 when turned down lits over the projecting end of the journal and holds itin place. When the latch is swung up on its fulcrum (L22, the springs will be compressed sufficiently to permit the hook as to snap over and release the journal.

In the modification shown in Figs. 5 and 6 the general features of construction are substantially as hereinbefore described, but the members D and E are longer and are semicylindrical for the greater part of their length. The shoulder d2 and the cooperating tongue e2 are made much longer, as are the lockingribs e4, which coperate with overhanging heads d5 to permit of greater extensibility of the device, the member D being cut away longitudinally at d8 below the heads d5 to permit the necessary tilting in assembling. Such modification may be used as a hooked jack in a dobby-head, and for this purpose the outer end of the member D has an overhanging hook d3 at its outer end provided with a fiat inclined engaging face d8. The opposite end of the member E is flattened at e6 and provided with a transverse hub e7, by which the device is mounted on a fulcrum or connecting stud. The spring SX is made correspondinglylong and operates between the abutment e' of one member and the closed end d of the other member. (See dotted lines, Fig. 5.)

The latch or dog herein shown is strong, durable, and simple in construction, and as the spring is wholly inclosed no obstruction is presented to catch or hold surrounding objects.

Having fullydescribed my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. An extensible latch or dog comprising two superposed, chambered members relatively movable longitudinally, an inclosed spring to resist such movement, and slidable locking means to prevent lateral separation of said members.

2. An extensible latch or dog comprising two superposed, longitudinally-chambered members relatively movable in the direction of their length, an inclosed expanding spring to resist such movement, and slidable locking means at or near the ends of the chambered portions of said members, to prevent their lateral separation.

3. An extensible latch or dog comprising tWo superposed, longitudinally-chambered members relatively movable in the direction of their length, an inclosed expanding spring to resist such movement, a tongue on one member, a cooperating overhanging shoulder on the other member, and external slidable locking means on said members at the opposite end of their chambered portion, to prevent lateral separation thereof.

4. An extensible latch or dog comprising two superposed, longitudinally-chambered members relatively movable in the direction of their length, an inclosed spring to resist such movement, one member having a longitudinal shoulder at one end, and opposite, inturned lugs at the other end, of its chambered portion, the other member having a tongue and external longitudinal ribs, to cooperate respeetively with the shoulder and lugs and constitute slidable locking means to prevent lateral separation of the members.

5. An extensible latch or dog comprising two superposed, chambered members relatively movable longitudinally, an inclosed spring to resist such movement, a hook on one end ot' one member, a lateral fulcrumhub on the opposite end of the other member, and slidable locking means to prevent lateral separation of said members.

6. An extensible beam-latch 'comprising two superposed, chambered members relatively movable longitudinally, an inclosed spiral spring to resist such movement, a hub on the end of one member, a fixed fnlcrum on which it is mounted, a latch-hook on the opposite end of the other member, and slidable locking means to prevent lateral separation of said members.

'7. An extensible beam-latch comprising two superposed, chambered members relatively movable longitudinally, an inclosed spiral spring to resist such movement, means to limit spring-:induced movement of the members, a fulcrum-hub on one member, a latch-hook on the opposite end of the other member, and slidably cooperating locking means on said members to prevent their lateral separation while permitting relative longitudinal movement.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOI-IN T. MEATS.

Witnesses:

JOHN C. EDWARDS, EMILY C. HoDG-Es.

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